function y = e_tet1(x)
% Extended Three Exponential Terms 1 function
%x0=[0.1,0.1,.....,0.1] 
%fmin=n/2
%Author:shi yangyang
n=length(x);
m=n/2;
y=ones(1,m);
for i=1:1:m
    t1=x(2*i-1)+3.0*x(2*i)-0.10;
    t2=x(2*i-1)-3.0*x(2*i)-0.10;
    t3=-x(2*i-1)-0.10;
    y(i)=exp(t1)+exp(t2)+exp(t3);
end
y=sum(y);